4 files changed, 147 insertions, 29 deletions
diff --git a/internal/feed/feed.go b/internal/feed/feed.go
index a04c3ce..38a7767 100644
--- a/internal/feed/feed.go
+++ b/internal/feed/feed.go
@@ -29,34 +29,6 @@ const (
 
 // TODO: parse cpe
 
-// CVSS attack complexity
-type AttackComplexity int
-
-// Unmarshal CVSS attack complexity from JSON.
-func (me *AttackComplexity) UnmarshalJSON(b []byte) error {
-  // decode string, check for error
-  var s string
-  if err := json.Unmarshal(b, &s); err != nil {
-    return err
-  }
-
-  // check value
-  switch s {
-  case "LOW":
-    *me = Low
-  case "MEDIUM":
-    *me = Medium
-  case "HIGH":
-    *me = High
-  default:
-    // return error
-    return fmt.Errorf("unknown attack complexity: %s", s)
-  }
-
-  // return success
-  return nil
-}
-
 // CVSS privileges required
 type PrivilegesRequired int
 
@@ -484,7 +456,7 @@ type CvssV3 struct {
   AttackVector V3AttackVector `json:"attackVector"`
 
   // attack complexity
-  AttackComplexity AttackComplexity `json:"attackComplexity"`
+  AttackComplexity V3AttackComplexity `json:"attackComplexity"`
 
   // privileges required
   PrivilegesRequired PrivilegesRequired `json:"privilegesRequired"`
diff --git a/internal/feed/v3attackcomplexity.go b/internal/feed/v3attackcomplexity.go
new file mode 100644
index 0000000..6e7481c
--- /dev/null
+++ b/internal/feed/v3attackcomplexity.go
@@ -0,0 +1,42 @@
+package feed
+
+//go:generate stringer -linecomment -type=V3AttackComplexity
+
+import (
+  "encoding/json"
+  "fmt"
+)
+
+// CVSS v3 attack complexity
+type V3AttackComplexity byte
+
+const (
+  V3ACLow V3AttackComplexity = iota // LOW
+  V3ACMedium // MEDIUM
+  V3ACHigh // HIGH
+)
+
+// Unmarshal CVSS v3 attack complexity from JSON.
+func (me *V3AttackComplexity) UnmarshalJSON(b []byte) error {
+  // decode string, check for error
+  var s string
+  if err := json.Unmarshal(b, &s); err != nil {
+    return err
+  }
+
+  // check value
+  switch s {
+  case "LOW":
+    *me = V3ACLow
+  case "MEDIUM":
+    *me = V3ACMedium
+  case "HIGH":
+    *me = V3ACHigh
+  default:
+    // return error
+    return fmt.Errorf("unknown CVSS v3 attack complexity: %s", s)
+  }
+
+  // return success
+  return nil
+}
diff --git a/internal/feed/v3attackcomplexity_string.go b/internal/feed/v3attackcomplexity_string.go
new file mode 100644
index 0000000..12110c8
--- /dev/null
+++ b/internal/feed/v3attackcomplexity_string.go
@@ -0,0 +1,25 @@
+// Code generated by "stringer -linecomment -type=V3AttackComplexity"; DO NOT EDIT.
+
+package feed
+
+import "strconv"
+
+func _() {
+	// An "invalid array index" compiler error signifies that the constant values have changed.
+	// Re-run the stringer command to generate them again.
+	var x [1]struct{}
+	_ = x[V3ACLow-0]
+	_ = x[V3ACMedium-1]
+	_ = x[V3ACHigh-2]
+}
+
+const _V3AttackComplexity_name = "LOWMEDIUMHIGH"
+
+var _V3AttackComplexity_index = [...]uint8{0, 3, 9, 13}
+
+func (i V3AttackComplexity) String() string {
+	if i >= V3AttackComplexity(len(_V3AttackComplexity_index)-1) {
+		return "V3AttackComplexity(" + strconv.FormatInt(int64(i), 10) + ")"
+	}
+	return _V3AttackComplexity_name[_V3AttackComplexity_index[i]:_V3AttackComplexity_index[i+1]]
+}
diff --git a/internal/feed/v3attackcomplexity_test.go b/internal/feed/v3attackcomplexity_test.go
new file mode 100644
index 0000000..a76efe3
--- /dev/null
+++ b/internal/feed/v3attackcomplexity_test.go
@@ -0,0 +1,79 @@
+package feed
+
+import (
+  "encoding/json"
+  "testing"
+)
+
+func TestV3AttackComplexityUnmarshalInvalidData(t *testing.T) {
+  test := []byte(`{}`)
+  var val V3AttackComplexity
+
+  if err := json.Unmarshal(test, &val); err == nil {
+    t.Errorf("got \"%s\", exp error", val)
+  }
+}
+
+func TestV3AttackComplexityUnmarshalUnknown(t *testing.T) {
+  test := []byte(`"foo"`)
+  exp := "unknown CVSS v3 attack complexity: foo"
+  var val V3AttackComplexity
+
+  err := json.Unmarshal(test, &val)
+  if err == nil {
+    t.Errorf("got \"%s\", exp error", val)
+    return
+  }
+
+  if err.Error() != exp {
+    t.Errorf("got \"%s\", exp \"%s\"", err.Error(), exp)
+  }
+}
+
+func TestV3AttackComplexityUnmarshalValid(t *testing.T) {
+  tests := []struct {
+    val string
+    exp V3AttackComplexity
+  } {
+    { "\"LOW\"", V3ACLow },
+    { "\"MEDIUM\"", V3ACMedium },
+    { "\"HIGH\"", V3ACHigh },
+  }
+
+  for _, test := range(tests) {
+    t.Run(test.val, func(t *testing.T) {
+      var got V3AttackComplexity
+      if err := json.Unmarshal([]byte(test.val), &got); err != nil {
+        t.Error(err)
+        return
+      }
+
+      if got != test.exp {
+        t.Errorf("got \"%s\", exp \"%s\"", got, test.exp)
+      }
+    })
+  }
+}
+
+func TestV3AttackComplexityString(t *testing.T) {
+  tests := []struct {
+    val V3AttackComplexity
+    exp string
+  } {
+    { V3ACLow, "LOW" },
+    { V3ACMedium, "MEDIUM" },
+    { V3ACHigh, "HIGH" },
+
+    { V3AttackComplexity(255), "V3AttackComplexity(255)" },
+  }
+
+  for _, test := range(tests) {
+    t.Run(test.exp, func(t *testing.T) {
+      got := test.val.String()
+
+      if got != test.exp {
+        t.Errorf("got \"%s\", exp \"%s\"", got, test.exp)
+      }
+    })
+  }
+}